Rosie Huntington-Whiteley

Balmain hosted an intimate dinner party at Chateau Marmont last evening with celebrity attendees like Nicole Richie and Rosie Huntington-Whiteley decked out in the designer du jour. Both ladies offered us different looks from Balmain's Spring 2013 collection - but whose outfit do you like best? Watch today's Fashion Flash for all the scoop from the party. On Allison: Sachin + Babi jacket, Zara top, BesoBeso jewelry.

Rosie Huntington-Whiteley led the pack of stylish stars at the Vogue UK dinner editor in chief Alexandra Shulman hosted for Michael Kors. Celebrities and style setters alike were decked out in designs by - you guessed it - the night's guest of honor. Miroslava Duma showed off bold stripes, Laura Bailey opted for paillettes, and Samantha Barks tried out a black bodysuit. Watch on for the details on who wore what.

Interviews with Shia LaBeouf, Josh Duhamel, Tyrese Gibson, Michael Bay, Patrick Dempsey, and Rosie Huntington-Whiteley about the making of Transformers: Dark of the Moon. The Autobots race to reach a Cybertronian spacecraft hidden on the Moon.

The only thing better than an old fashioned Hollywood feud is a Hollywood fashion faceoff! Get ready for a style showdown in this edition of Who Wore It Best? Selena Gomez rocked an adorable bustier to her Spring Breakers premiere, but did Katy Perry look better in the same top at Coachella? Then there's Olivia Munn vs. Nicky Hilton. Both girls went floral in a springtime dress by Valentino, but who gets your vote? Finally, Rosie Huntington-Whiteley vs. Miley Cyrus--double fouls! The girls each decided to play referee in Chanel's black and white striped jump-suit, but we really don't like either!